Mobility

Umm, no way. Teleport is near useless with lag. Its just like pot lag or loot lag, you can't do anything else until the game hears back from the server. Same is true for combat step in lag.
If the lag is bad enough and you have speed equips, it's faster to just move normally rather that teleport and then wait for the update.
The idea of tele-attack that really old guides mention seems no more than a myth. Maybe they changed how it works at some point.

More on topic: Combat step in El Nath (without snowshoes) is fun!

I don't mean internet/server/everyone but you freezes lag, I mean "I have a noob comp" lag.